+# Build data structures for "Opt In" and "Contact Type" checkboxes
+#
+# By default, message recipients will be selected, this is a message.
+# By default, all Contact Types will be selected, but this may be
+# overridden by passing 'classnums' get/post values. If no contact
+# types have been defined, the option will not be presented.
+
+my @active_classes = qsearch(contact_class => {disabled => ''} );
+
+my %classnum_ischecked;
+my %dest_ischecked;
+
+$CGI::LIST_CONTEXT_WARN = 0;
+if ( my @in_classnums = $cgi->param('classnums') ) {
+ # Set checked boxes from form input
+ for my $v (@in_classnums) {
+
+ if ( $v =~ /^\d+$/ ) {
+ $classnum_ischecked{$v} = 1
+ } elsif ( $v =~ /^(invoice|message)$/ ) {
+ $dest_ischecked{$v} = 1;
+ }